How Do I View and Modify ECS Security Group Rules?

On the ECS details page, click the Security Groups tab and view security group rules. To enable DAS to access the instances built on ECSs, you need to add an inbound rule with the port set to 3306 (example) and source to 100.0.0.0/8.
Figure 1 Security group rules
Click Manage Rule on the left. On the Inbound Rules tab page, click Add Inbound Rule. .
Figure 2 Adding inbound rules

Note
Recommended configuration: Select TCP for Protocol & Port, enter the port number of the self-built database, and set the source to 100.0.0.0/8 or 0.0.0.0/0.
On the Outbound Rules page, click Add Outbound Rule.
Figure 3 Adding outbound rules

Note
Recommended configuration: Select TCP for Protocol & Port, enter the port number of the self-built database, and set the source to 100.0.0.0/8 or 0.0.0.0/0.

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